A sound absorber attenuates the sound level by `20 dB`. The intensity decreases by a factor of

Options

A. 10000
B. 10
C. 100
D. 1000

Answer

C

Explanation

`beta_(2) - beta_(1) = 10 log"(I_(2))/(I_(1)) = 20dB` `rArr (I_(2))/(I_(1))= 100`